These activities provide students with the opportunity to explore geometric concepts such as symmetry, transformations, and even fractal geometry in a way no other teaching tool can. The dynamic ca...More: lessons, discussions, ratings, reviews,...

GeoCon HD is designed to be used by students, teachers and math enthusiasts studying plane geometry. With GeoCon HD various constructions can be created with the touch of a finger. Resolve constructio...More: lessons, discussions, ratings, reviews,...

GeoCon is designed to be used by students, teachers and math enthusiasts studying plane geometry. With GeoCon various constructions can be created with the touch of a finger. Resolve construction task...More: lessons, discussions, ratings, reviews,...

Students construct a pentagon with its exterior angles, measure the angles and find the sum. They then dilate the pentagon to look at the problem, and understand their result, in a new way. The lin...More: lessons, discussions, ratings, reviews,...

The question of where patrons should stand to enjoy the best view of a painting is one that art gallery curators must consider on a regular basis. For this activity, we will consider a painting that i...More: lessons, discussions, ratings, reviews,...

A group of Logo procedures to investigate angles. Use these two ways: if time is short, use the procedures as they are to investigate angles with students. If there's more time, let students join in c...More: lessons, discussions, ratings, reviews,...

The following lesson is designed to introduce students to acute, obtuse, and right angles. It is also designed to introduce students to vertical angles, adjacent angles, alternate interior angles and ...More: lessons, discussions, ratings, reviews,...

A collection of illustrated concepts, including problems for students to work out, and standalone word problems. Includes automated feedback. Pre- and post-tests, answer sheets, additional help, tools...More: lessons, discussions, ratings, reviews,...

What can you learn about angles by looking at letters? Look at the letters V, K, and L and learn about acute, obtuse, and right angles. While there, take a look at the letter X and learn about verti...More: lessons, discussions, ratings, reviews,...

This material is based upon work supported by the
National Science Foundation under Grant DUE-0226284.
Any opinions, findings, and conclusions or recommendations
expressed in this material are those of the author(s)
and do not necessarily reflect the views of the
National Science Foundation.